package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        // 创建集合，用于封装日期 begin~end
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        // 循环遍历，将日期封装到dateList集合中
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 创建集合，用于封装日期对应的营业额数据
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 获取日期对应的营业额数据
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 创建集合，用于封装日期 begin~end
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        // 循环遍历，将日期封装到dateList集合中
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 创建集合，用于封装日期对应的新增用户数量
        List<Integer> newUserList = new ArrayList<>();
        // 创建集合，用于封装日期对应的总用户数量
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);
            // 根据条件查询总用户数量
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);

            map.put("begin", beginTime);
            // 根据条件查询新增用户数量
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);
        }

        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        // 创建集合，用于封装日期 begin~end
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);
        // 循环遍历，将日期封装到dateList集合中
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 创建集合，用于封装日期对应的订单总数量
        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            // 获取日期对应的订单总数量
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Integer orderCount = getOrderCount(beginTime, endTime, null);
            orderCountList.add(orderCount);

            // 获取日期对应的有效订单数量
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            validOrderCountList.add(validOrderCount);

        }

        // 计算总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        // 计算有效数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        // 计算订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 销量排名
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        return SalesTop10ReportVO
                .builder()
                .nameList(StringUtils.join(names, ","))
                .numberList(StringUtils.join(numbers, ","))
                .build();
    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        // 查询数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        // 将数据写到 Excel文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        // 创建Excel对象
        try {

            XSSFWorkbook excel = new XSSFWorkbook(in);
            // 填充数据
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间" + dateBegin + "至" + dateEnd);

            // 获取第4行
            XSSFRow row4 = sheet.getRow(3);
            row4.getCell(2).setCellValue(businessData.getTurnover());
            row4.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row4.getCell(6).setCellValue(businessData.getNewUsers());

            // 获取第5行
            XSSFRow row5 = sheet.getRow(4);
            row5.getCell(2).setCellValue(businessData.getValidOrderCount());
            row5.getCell(4).setCellValue(businessData.getUnitPrice());

            // 填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                // 查询日期对应的数据
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                XSSFRow row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());
            }

            // 下载Excel文件
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);


            // 关闭资源
            out.close();
            excel.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }




    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status) {
        Map map = new HashMap();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);
        return orderMapper.countByMap(map);
    }
}
